document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=945793>Question 945793</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangles length is 3 times as long as its width. The diagonal of the rectangle is 10cm. Use Pythagoras theorem to solve. \r<BR>\n" );
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document.write( "This is what I have tried, but it does not seem to work:\r<BR>\n" );
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document.write( "I use this formula: a^2=b^2+c^2\r<BR>\n" );
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document.write( "10^2=3x^2+x^2 \r<BR>\n" );
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document.write( "100=4x^2 \r<BR>\n" );
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document.write( "100/4=4x^2/4\r<BR>\n" );
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document.write( "25=x^2 \r<BR>\n" );
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document.write( "sqrt( 25 )=sqrt( x^2 )\r<BR>\n" );
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document.write( "5=x \r<BR>\n" );
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document.write( "x cannot equal 5. I don't know what I am doing wrong. <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #576942 by </B><A HREF=/tutors/aboutme.mpl?userid=428225><B>428225(90)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=428225><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=428225><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=576942\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">     <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/display-illustration.mpl?tutor=428225&illustration_name=1423396624441.jpg\">\r<BR>\n" );
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document.write( "You need to make a habit of using brackets. You were right in recognizing that the length was 3x. Since 3x=a, so when you find a^2, you have to square the whole of 3x. However you thought it was <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%28x%29%5E2 ALIGN=MIDDLE  ALT=\"3%28x%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, when it was actually <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%283x%29%5E2 ALIGN=MIDDLE  ALT=\"%283x%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >. So if you had used brackets you probably would have gotten the right answer. </SPAN>\n" );
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